Heating arrangement for automobile motors



H. HAKANSQN HEATING ARRANGEMENT FOR AUTOMOBILE MOTORS Filed Feb. 9, 1932 6 2 o /o lllllJ OA-- f .A u FIIIIIIIIIH m ,IIL .O/ Q V @o 7 5 Fig. 5

Patented Sept. 17, 1935 NETD osrics HEATING ABRANGEMENT FSR AUTOMO- BILE MOTORS Harald Hakanson, Vasteras, Sweden 2 Claims.

My invention relates to certain new and useful improvements in water cooling systems of internal combustion motors as applied on automobiles, tractors, flying planes, motorboats and other transporting means and has for its object the heating oi the cooling liquid, particularly Water for preventing its freezing in the radiator, motor and circulating pump when the motor is shut down for some time at temperatures below the freezing point. Several devices have been proposed for such purpose but most of them have failed because they have not been suited for attaching to standard makes of motor sets.

This invention relates to a device of special shape which occupies only a moderate space in ythe liquid cooling pipe system where it is supposed to be attached and therefore may easily be adapted to any type of internal combustion motors.

The novelty of this invention is represented in the art of making the transmission of heat from an outside source to the liquid where the heat will produce a thermal circulation through the entire cooling system. The primary source oi heat may be an electric heating element of any practical type, connected to the accumulator of the automobile or to an electric light net if such connection can be arranged where the automobile is parked. The source of heat may also be an electric heat accumulator carried on the automobile and charged by electric current from the garage supply in the night whereby heat is being stored to be transmitted to the circulating liquid when the automobile is parked on open places. A catalytic petrol burning stove, a petrol or parafn lamp of the miners safety type or any other similar primary heater of known design may also be used for transmission of heat to the liquid.

In order that the invention will be more readily understood I will describe some particular forms thereof with reference to the accompanying drawing.

In the drawing Fig. l is a side View partly broken away and showing one form of the heating unit, Fig. 2 is an end view of the same shown partly in section, Fig. 3 is an end View of a modied form or the unit; Fig. 4 is a sectional View looking at right angles to Fig. 3, and Fig. 5 is a view drawn to a smaller scale and showing a heating unit applied to a stove of known design.

Referring to Fig. 1 oi the drawing, my invention is shown as applied for direct electric heating of the cooling liquid in an internal combustion motor. The metal tube l of a good heat conducting material as for instance copper is supposed to be inserted by means of hose connections in the piping between the radiator and water jacket or circulating pumps. It can also be connected between the pump and the water jacket or in any other proper place in direct or shunt connection to the water piping. The tube I is combined with a heat transmitting body 2 which, in this case, is shaped as a plate but just as well can have any other practical shape.

The plate 2 which also is made of a good heat conducting material is joined to the tube I so as to be in good heat conducting relation thereto for instance by casting, welding or brazing, and may pass through the wall of said tube down into the liquid in order to further the transmission of heat not only through the walls of the tube but mainly trom the plate itself inside the tube.

The inside part of the body 2 may always have a longitudinal section in order to diminish the resistance to the circulation of the liquid.

rlhe heat transmitting body Z receives the heat from the primary heater directly or through another heat transmitting body. In Fig. 2 are shown two electrical heating elements 3 arranged one on each side of the plate 2 and in a good 25 thermical contact with the same.

The heating element consists of an electric reisstance wound on a sheet of mica and insulated on both sides with mica. The complete heating element is enclosed in an envelope of copper or nickel or any other heat conducting noncorroding sheet metal 4. Both elements are on the outside insulated against loss of heat by means of the plates 5 composed of asbestos or any other heat insulating material. They rest on a support 9 and press against the copper plate 2 by means of screws 'l and nuts.

The top of the heater is covered by a plate of bakelite 5 fastened by screws to the end of the plate 2. The object of this place is to prevent air 40 circulation through the heater. The ends of the heat resistances in the electric elements 3 are connected inside the heater to four screws leading through the plates 5 and forming the terminals with their nuts 8 of insulating material.

In many cases where the accessible space in the piping is too short to permit the insertion of a heat transmitting tube l of the length shown in Fig. 1, the length may be shortened if the heat transmitting plate 2 is turned in an angle to the axis of the tube l. Such design is shown in Figs. 3 and il, where the plate l@ has been turned in relation to the axis of the tube ll. The supports l2 serve to establish a sufficient heat 55 transmitting surface between the plate I and the pipe Il. The flanges I3 serve to distribute the heat into the mass of liquid circulating in the pipe.

Fig. shows a heat transmitting device applied to a catalytic petrol burning stove of known design. The heat receptacle I4 consists in this case of a disc of a good heat conducting material as for instance copper which is attached to the upper side of the catalytic burner and collects the heat from the Warm gases passing through perforations in the disc. The heat is further transmitted by an insulated bar I5 to the liquid carrying tube I6 which may be situated on any side of or above or below the stove.

'I'his invention may be modified in many different ways according to the various designs of combustion motors without diverting from the characteristic device of a combination of a heat conducting tube mechanically and thermically joined to a heat conducting body in order to transmit heat from an outside source to an inside circulating liquid.

I claim as my invention:-

1. A heating unit of the character described for circulating liquids comprising a conduit for said liquid, a metal plate inside said conduit in contact with the liquid and disposed parallel to the longitudinal direction thereof, a metal plate projecting outwardly from said conduit in good heat-conducting communication with said inner plate, and a readily accessible heating device adjacent to said outer plate.

2. A heating unit of the character described for circulating liquids comprising a conduit for said liquid, a plate of good heat-conducting metal inside said conduit in Contact with the liquid and disposed parallel to the longitudinal direction thereof, a metal plate projecting substantially radially outwards from said conduit being integral with said inner plate, and a heating device adjacent to said outer plate.

HARALD HKANsoN. 

